After finishing the installation process, the installer asked for a system reboot.During boot the system, it "hanged". The progress bar was freezing and a circle started below the progress bar.I waited until the next morning, the system stopped.

Then I started the restore by Time Capsule, with no result. I tried a clean install, and after installing a few apps, I reinstalled Little Snitch, with the same result as above. This happened three times per Mac, six at all.

I am now frustrated and need support. Maybe Objective can give some words to that.